RCIM User’s Guide
2
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6
See Chapter 3 for information on using external output interrupts and programmable
interrupts.
The pin-outs for the external interrupt I/O connector are shown in Figure 2-3.
Figure 2-3 RCIM IV External Interrupt I/O Connector Pin-outs
RCIM IV external interrupt inputs have a selectable termination of 100 Ohms and are
capable of 3.3V or 5V TTL levels. The recommended input signal duration is 1us and
because termination can be disabled there is no minimum amperage requirement for line
drivers.
The RCIM IV currently does not support any programmable input sources. However,
future revisions of the RCIM IV will support two programmable input sources, DCLS
input and an external 10Mhz clock, that can be assigned to a physical pin to discipline the
masterclock. The DCLS input will enable digital IRIG input, and the external 10Mhz
clock input will automatically discipline the RCIM masterclock regardless of what other
clocksources exist on the RCIM.
The signals
EXT_RXD
and
EXT_TXD
are RS-232 level signals. They are currently used for
debug purposes.
X
1
EXT_INOUT0
2
EXT_INOUT1
3
EXT_INOUT2
4
EXT_INOUT3
5
EXT_INOUT4
6
EXT_INOUT5
7
EXT_INOUT6
8
EXT_INOUT7
9
EXT_INOUT8
26
EXT_INOUT9
25
EXT_INOUT10
24
EXT_INOUT11
23
22
EXT_AMOUT
21
EXT_AMIN
20
EXT_TXD
19
EXT_RXD
18
GND
17
GND
16
GND
15
GND
14
GND
13
GND
12
GND
11
GND
10
GND
Содержание RCIM
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